Hi guys I know of two near me.
There's Tokaida at Kirkby Stephen, very good site 3 mins from town centre with all possible amenities on & off site.
Then theres Tan Hill inn high up on the Pennines. Basic but brilliantly wild, and a camping barn if weather turns bad.
Both can be contacted online. Enjoy

Try the Three Horseshoes near Cadwell Park in Lincolnshire. Small campsite but great for bikers because there is a biker friendly pub with it.

They are open to use the place for biker events, catering, bike nights and even have an indoor campsite for a group - you don't even need to bring a tent. Not expensive and with a few beers and food, ideal for a group of friends.

Hi Ian, Thanks for the tip, but please fill out the user cp up on the left hand side and tell us a bit about yourself, like where you're from, what you do, etc. Or are you trying to sneak in under the net and spam us as the owner of the aforesaid watering hole?